$OpenBSD: patch-gcc_tree-dump_c,v 1.1.1.1 2010/10/10 17:39:06 steven Exp $
--- gcc/tree-dump.c.orig	Thu Mar 16 20:47:19 2006
+++ gcc/tree-dump.c	Mon Jun 14 19:23:04 2010
@@ -867,7 +867,7 @@ get_dump_file_name (enum tree_dump_index phase)
 	dump_id[0] = '\0';
     }
 
-  return concat (dump_base_name, dump_id, dfi->suffix, NULL);
+  return concat (dump_base_name, dump_id, dfi->suffix, (void *)0);
 }
 
 /* Begin a tree dump for PHASE. Stores any user supplied flag in
